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-rw-r--r--src/plugins/linux-cp/lcp.c32
-rw-r--r--src/plugins/linux-cp/lcp.h14
-rw-r--r--src/plugins/linux-cp/lcp_cli.c49
-rw-r--r--src/plugins/linux-cp/lcp_interface.c8
-rw-r--r--src/plugins/linux-cp/lcp_router.c60
5 files changed, 163 insertions, 0 deletions
diff --git a/src/plugins/linux-cp/lcp.c b/src/plugins/linux-cp/lcp.c
index 69a7a6e42ba..33c71e44143 100644
--- a/src/plugins/linux-cp/lcp.c
+++ b/src/plugins/linux-cp/lcp.c
@@ -113,6 +113,38 @@ lcp_auto_subint (void)
return lcpm->lcp_auto_subint;
}
+void
+lcp_set_del_static_on_link_down (u8 is_del)
+{
+ lcp_main_t *lcpm = &lcp_main;
+
+ lcpm->del_static_on_link_down = (is_del != 0);
+}
+
+u8
+lcp_get_del_static_on_link_down (void)
+{
+ lcp_main_t *lcpm = &lcp_main;
+
+ return lcpm->del_static_on_link_down;
+}
+
+void
+lcp_set_del_dynamic_on_link_down (u8 is_del)
+{
+ lcp_main_t *lcpm = &lcp_main;
+
+ lcpm->del_dynamic_on_link_down = (is_del != 0);
+}
+
+u8
+lcp_get_del_dynamic_on_link_down (void)
+{
+ lcp_main_t *lcpm = &lcp_main;
+
+ return lcpm->del_dynamic_on_link_down;
+}
+
/*
* fd.io coding-style-patch-verification: ON
*
diff --git a/src/plugins/linux-cp/lcp.h b/src/plugins/linux-cp/lcp.h
index 14c1a6e2a75..4ddaa3898d6 100644
--- a/src/plugins/linux-cp/lcp.h
+++ b/src/plugins/linux-cp/lcp.h
@@ -26,6 +26,8 @@ typedef struct lcp_main_s
int default_ns_fd;
u8 lcp_auto_subint; /* Automatically create/delete LCP sub-interfaces */
u8 lcp_sync; /* Automatically sync VPP changes to LCP */
+ u8 del_static_on_link_down; /* Delete static routes when link goes down */
+ u8 del_dynamic_on_link_down; /* Delete dynamic routes when link goes down */
u8 test_mode; /* Set when Unit testing */
} lcp_main_t;
@@ -38,6 +40,18 @@ int lcp_set_default_ns (u8 *ns);
u8 *lcp_get_default_ns (void); /* Returns NULL or shared string */
int lcp_get_default_ns_fd (void);
+/**
+ * Get/Set whether to delete static routes when the link goes down.
+ */
+void lcp_set_del_static_on_link_down (u8 is_del);
+u8 lcp_get_del_static_on_link_down (void);
+
+/**
+ * Get/Set whether to delete dynamic routes when the link goes down.
+ */
+void lcp_set_del_dynamic_on_link_down (u8 is_del);
+u8 lcp_get_del_dynamic_on_link_down (void);
+
#endif
/*
diff --git a/src/plugins/linux-cp/lcp_cli.c b/src/plugins/linux-cp/lcp_cli.c
index 8f2d17ab209..ff84e74809a 100644
--- a/src/plugins/linux-cp/lcp_cli.c
+++ b/src/plugins/linux-cp/lcp_cli.c
@@ -174,6 +174,55 @@ VLIB_CLI_COMMAND (lcp_auto_subint_command, static) = {
};
static clib_error_t *
+lcp_param_command_fn (vlib_main_t *vm, unformat_input_t *input,
+ vlib_cli_command_t *cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "del-static-on-link-down"))
+ {
+ if (unformat (line_input, "on") || unformat (line_input, "enable"))
+ lcp_set_del_static_on_link_down (1 /* is_del */);
+ else if (unformat (line_input, "off") ||
+ unformat (line_input, "disable"))
+ lcp_set_del_static_on_link_down (0 /* is_del */);
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ }
+ else if (unformat (line_input, "del-dynamic-on-link-down"))
+ {
+ if (unformat (line_input, "on") || unformat (line_input, "enable"))
+ lcp_set_del_dynamic_on_link_down (1 /* is_del */);
+ else if (unformat (line_input, "off") ||
+ unformat (line_input, "disable"))
+ lcp_set_del_dynamic_on_link_down (0 /* is_del */);
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ }
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ }
+
+ unformat_free (line_input);
+ return 0;
+}
+
+VLIB_CLI_COMMAND (lcp_param_command, static) = {
+ .path = "lcp param",
+ .short_help = "lcp param [del-static-on-link-down (on|enable|off|disable)] "
+ "[del-dynamic-on-link-down (on|enable|off|disable)]",
+ .function = lcp_param_command_fn,
+};
+
+static clib_error_t *
lcp_default_netns_command_fn (vlib_main_t *vm, unformat_input_t *input,
vlib_cli_command_t *cmd)
{
diff --git a/src/plugins/linux-cp/lcp_interface.c b/src/plugins/linux-cp/lcp_interface.c
index a822a5498d8..142ac505fcc 100644
--- a/src/plugins/linux-cp/lcp_interface.c
+++ b/src/plugins/linux-cp/lcp_interface.c
@@ -134,6 +134,10 @@ lcp_itf_pair_show (u32 phy_sw_if_index)
vlib_cli_output (vm, "lcp lcp-auto-subint %s\n",
lcp_auto_subint () ? "on" : "off");
vlib_cli_output (vm, "lcp lcp-sync %s\n", lcp_sync () ? "on" : "off");
+ vlib_cli_output (vm, "lcp del-static-on-link-down %s\n",
+ lcp_get_del_static_on_link_down () ? "on" : "off");
+ vlib_cli_output (vm, "lcp del-dynamic-on-link-down %s\n",
+ lcp_get_del_dynamic_on_link_down () ? "on" : "off");
if (phy_sw_if_index == ~0)
{
@@ -571,6 +575,10 @@ lcp_itf_pair_config (vlib_main_t *vm, unformat_input_t *input)
lcp_set_auto_subint (1 /* is_auto */);
else if (unformat (input, "lcp-sync"))
lcp_set_sync (1 /* is_auto */);
+ else if (unformat (input, "del-static-on-link-down"))
+ lcp_set_del_static_on_link_down (1 /* is_del */);
+ else if (unformat (input, "del-dynamic-on-link-down"))
+ lcp_set_del_dynamic_on_link_down (1 /* is_del */);
else
return clib_error_return (0, "interfaces not found");
}
diff --git a/src/plugins/linux-cp/lcp_router.c b/src/plugins/linux-cp/lcp_router.c
index 34d0500b0c5..4fc824ca5ad 100644
--- a/src/plugins/linux-cp/lcp_router.c
+++ b/src/plugins/linux-cp/lcp_router.c
@@ -468,6 +468,66 @@ lcp_router_link_sync_end (void)
LCP_ROUTER_INFO ("End synchronization of interface configurations");
}
+static clib_error_t *
+lcp_router_link_up_down (vnet_main_t *vnm, u32 hw_if_index, u32 flags)
+{
+ vnet_hw_interface_t *hi;
+ index_t lipi;
+
+ hi = vnet_get_hw_interface_or_null (vnm, hw_if_index);
+ if (!hi)
+ return 0;
+
+ lipi = lcp_itf_pair_find_by_phy (hi->sw_if_index);
+ if (lipi == INDEX_INVALID)
+ return 0;
+
+ /* When the link goes down on an interface, the kernel processes routes which
+ * resolve through that interface depending on how they were created:
+ * - Legacy Route API: the kernel retains the routes and marks them as
+ * "linkdown";
+ * - Nexthop API: the kernel removes the next-hop objects and the routes
+ * which reference them.
+ *
+ * For IPv4 routes created with Nexthop API, the kernel will not send any
+ * explicit RTM_DELROUTE messages about removing them. In order to
+ * synchronize with the kernel, affected routes need to be manually removed
+ * from the FIB.
+ *
+ * The behavior is different for IPv6 routes created with Nexthop API. The
+ * kernel will send explicit RTM_DELROUTE messages about IPv6 routes being
+ * removed.
+ */
+ if (!(flags & VNET_HW_INTERFACE_FLAG_LINK_UP) &&
+ (lcp_get_del_static_on_link_down () ||
+ lcp_get_del_dynamic_on_link_down ()))
+ {
+ u32 fib_index;
+ lcp_router_table_t *nlt;
+
+ fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ hi->sw_if_index);
+
+ pool_foreach (nlt, lcp_router_table_pool)
+ {
+ if (fib_index == nlt->nlt_fib_index &&
+ FIB_PROTOCOL_IP4 == nlt->nlt_proto)
+ {
+ if (lcp_get_del_static_on_link_down ())
+ lcp_router_table_flush (nlt, hi->sw_if_index, lcp_rt_fib_src);
+ if (lcp_get_del_dynamic_on_link_down ())
+ lcp_router_table_flush (nlt, hi->sw_if_index,
+ lcp_rt_fib_src_dynamic);
+ break;
+ }
+ }
+ }
+
+ return 0;
+}
+
+VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION (lcp_router_link_up_down);
+
static fib_protocol_t
lcp_router_proto_k2f (uint32_t k)
{